What is $GEAC$ and what are its objectives?

America obtained a patent right on ...... through the ...... and Trademark Office.

Genetic modification has:
$I$. reduced reliance on chemical pesticides
$II$. reduced post-harvest losses
$III$. increased efficiency of minerals used by the plants
$IV$. enhanced nutritional value of the food
Which of the statements given above are correct?

Given below are two statements:
Statement $I$: $Bt$ toxins are insect group specific and coded by a gene $cry$ $IAc$.
Statement $II$: $Bt$ toxin exists as an inactive protoxin in $B. \text{ thuringiensis}$. However, after ingestion by the insect, the inactive protoxin gets converted into an active form due to the alkaline $pH$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:

$Bt$ cotton is used to destroy:

The vector commonly used for transformation in crop plants is ......